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Valvetrain noise

This is a discussion on Valvetrain noise within the Internal Engine forums, part of the LSx Technical Help Section category; Is it common to have a loud valvetrain?? Mine is loud and is noticeable as I drive by places and ...

  1. #1
    Member chieftransam's Avatar
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    2001 Pontiac Trans Am M6

    Valvetrain noise

    Is it common to have a loud valvetrain?? Mine is loud and is noticeable as I drive by places and it echoes back. I'm not sure if it's the lifters or what. Any input on this? I just want it to be quiet. I have the stage II cnc ported heads and a 224 .581 112 cam. It sounds like a tapping or ticking noise. It's definately not a knock though.

  2. #2
    Yo Da Lin The Valley..... astyles's Avatar
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    these motors are just make noise.......some days i swear mine is coming apart any minute

  3. #3
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    The cam is going to make it sound like a sewing machine, no real way to get around that.

  4. #4
    Member chieftransam's Avatar
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    so it's always going to sound like that? I don't like it... but I love the way she runs..lol!

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    im have the same sewing machine noise , and i can hear it inside my car with the windows up. i posted over in ls1tech and people have suggested checking the pushrod length, rocker arms losing their needle bearings, and to retorque everything.

    anyone else got anything?

  6. #6
    Install some LS7 lifters and correct length pushrods.

  7. #7
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    currentlyhave comp 918s and hardened 7.4 pushrods.

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    Senior Member OnEbAdReDSS's Avatar
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    i got the same noise but kinda goes away after warming up but some times i just stays there... motor is stock with 107,000 miles

  9. #9
    Quote Originally Posted by Loudz28 View Post
    currentlyhave comp 918s and hardened 7.4 pushrods.
    That's nice. But that's neither an LS7 lifter nor the correct length pushrod!

  10. #10
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    Exaust leak? The echoing back part caught my attention. My headers came with EGR but was blocked off. The EGR tube where it attachs to the primary developed a crack that was BIOCH to find. It finally cracked off an a MIG made short work of the hole. Its hard to believe but that little piece that broke off weighs several #s because it made out of the same stainless steel as the headers. I guess the vibration of the engine developed a stress crack.
    TSP 347 SB, TSP Stage 2.5 PRC LS6, TSP MS4, Performabuilt Stage 2 4L60E, Yank PT4000, 4.11s, Fast 90/90, FTRA Cold air intake+all the free mods, Dynatech Supermaxx Exaust System, DMH Cutouts, Hooker Catback/FTRA Tips. Tuned by RPM/Garner NC. 11.28@119

  11. #11
    Member chieftransam's Avatar
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    2001 Pontiac Trans Am M6

    I've had my car checked numerous times for an exhaust leak and they all tell me everything is fine. Other people say it could be either the gold springs I have or the lifters?

  12. #12
    Alabama Member bamaz28's Avatar
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    factory lifters still in it?

  13. #13
    Member chieftransam's Avatar
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    yeah still factory lifters, but everything inside the heads are from patriot--even the new pushrods.

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    Alabama Member bamaz28's Avatar
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    06 Jeep Grand Cherokee.
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    if cam has been changed also new lifters should have went in with it.
    i actually have freind that works for patriot performance, he use to have his car on their website as a customer. his name is Vann

  15. #15
    Quote Originally Posted by chieftransam View Post
    yeah still factory lifters, but everything inside the heads are from patriot--even the new pushrods.
    What size pushrods? Unless the heads have been milled a lot and you're running a thinner than stock head gasket, you should be OVER 7.400"

  16. #16
    Junior Member greenvilleTA's Avatar
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    With my old motor, I had a TR230/224 with the 918 springs and TR hardened pushrods (stock length) and it was ticking pretty loud...even concerned the shop guys. When I build my new motor, I put a 232/234, but changed to comp r-series roller lifters and used a pushrod length checker to find my old pushrods were too short. Got the correct length and my new motor is almost silent in the engine bay. I'm a believer in making sure the pushrods are the correct length now. Especially since in my old loud motor, I had a valve hit my piston at high RPM and destroy a head, piston, etc...
    4" Stroker Crank/4340 H Beam Rods/Forged Pistons/File to fit Plasma Moly Rings/Patriot S2 LS6 heads/Harland Sharp rockers/SLP Lid/Smooth Bellowes/Comp 232/234 595/598 112 lsa/chrome-moly push rods/LS1 Edit/LS6 intake/Spec3 clutch/Fidenza aluminum flywheel/4.10s/MAC mid-lengths/MAC ORY/SLP catback

  17. #17
    Member chieftransam's Avatar
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    well I got the h/c setup from patriot. Also they set me up with a complete package to include what I thought was the correct size pushrods. I would guess 7.4? I honestly don't know. (I have a 224/224 .581/.581 112 lsa with stage 2 cnc ported heads 59cc)

  18. #18
    Member TACE02's Avatar
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    ASC #753
    2002 Collector's Edition

    sounds to me you have correct length, I doubt Patriot would send the wrong length knowing the setup... Yours is similar to mine, stage 2 59cc, 7.4 pushrods all done by a performance shop. Mine is pretty loud, has been since the install 2 years ago. Might try different oils. Mine seemed to get louder with the Royal Purple 10W-30. Mobile synthetic was quieter. Gonna try some different oil once I finish off this case I have.

  19. #19
    Member TACE02's Avatar
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    ASC #753
    2002 Collector's Edition

    On a side note, what kind of numbers did you put down? And are you happy with the performance increase?

  20. #20
    Member chieftransam's Avatar
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    Mine will be due for an oil change soon, so I'll try something different.


    The day I got the dyno tune I had the mt et street radials and stock exhaust still on and it got 410 rwhp and 390 tq. When the e-cutout was open it was up around 422 rwhp and 399 tq.

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